# 서울 어린이집회계 vs 자연과학OX

The clearest difference is in-app purchases: 서울 어린이집회계 at none against 자연과학OX's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 자연과학OX sells 3 in-app purchases, starting at $2.99 per month. 서울 어린이집회계 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 서울 어린이집회계 | 자연과학OX |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | — | Freemium |
| Size | 19 MB | 26 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [On and On Information System Co., Ltd.](https://appshunter.io/developer/599500889) | [CHAE HYUCK LEE](https://appshunter.io/developer/1658701307) |

## What reviewers say

### 서울 어린이집회계

[App page](https://appshunter.io/ios/app/id1536532184)

**Features:** Vision Pro support

**In-app purchases:** none


### 자연과학OX

[App page](https://appshunter.io/ios/app/ox/id6479007396)

This app offers practice quizzes for recent natural science topics, covering physics, chemistry, biology, and earth science. It provides subscription options for enhanced learning features and detailed explanations.

**Highlights:** Physics quizzes, Chemistry quizzes, Biology quizzes, Earth science quizzes, Subscription for explanations, Practice quizzes

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 단원 설정권 | $2.99 | per month |
| 무제한 해설권 | $3.99 | per month |
| 평생 자유 이용권 | $19.99 | one-time |


## Frequently asked questions

### Is 서울 어린이집회계 free?

서울 어린이집회계 is free to download, with no in-app purchases.

### Is 자연과학OX free?

자연과학OX is free to download, with in-app purchases available.

### Do 서울 어린이집회계 or 자연과학OX have ads?

Neither 서울 어린이집회계 nor 자연과학OX shows ads.

### Which is updated more often, 서울 어린이집회계 or 자연과학OX?

서울 어린이집회계 ships an update every 4 months, and 자연과학OX every 4 months. Most recently, 서울 어린이집회계 was updated on October 27, 2026 and 자연과학OX on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*